target/linux/bcm27xx/patches-5.4/950-0246-drm-vc4-Need-to-call-drm_crtc_vblank_-on-off-from-vc.patch

   1 From 236758b499086e0de280407396550125f1b6647a Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 9 Apr 2019 18:14:44 +0100
   4 Subject: [PATCH] from
   5  vc4_crtc_[en|dis]able
   6
   7 vblank needs to be enabled and disabled by the driver to avoid the
   8 DRM framework complaining in the kernel log.
   9
  10 vc4_fkms_disable_vblank needs to signal that we don't want vblank
  11 callbacks too.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  14 ---
  15  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 7 +++++++
  16  1 file changed, 7 insertions(+)
  17
  18 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  19 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  20 @@ -21,6 +21,7 @@
  21  #include "drm/drm_fourcc.h"
  22  #include "drm/drm_probe_helper.h"
  23  #include "drm/drm_drv.h"
  24 +#include "drm/drm_vblank.h"
  25  #include "linux/clk.h"
  26  #include "linux/debugfs.h"
  27  #include "drm/drm_fb_cma_helper.h"
  28 @@ -563,6 +564,8 @@ static void vc4_crtc_mode_set_nofb(struc
  29
  30  static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  31  {
  32 +       drm_crtc_vblank_off(crtc);
  33 +
  34         /* Always turn the planes off on CRTC disable. In DRM, planes
  35          * are enabled/disabled through the update/disable hooks
  36          * above, and the CRTC enable/disable independently controls
  37 @@ -578,6 +581,7 @@ static void vc4_crtc_disable(struct drm_
  38
  39  static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  40  {
  41 +       drm_crtc_vblank_on(crtc);
  42         /* Unblank the planes (if they're supposed to be displayed). */
  43
  44         if (crtc->primary->state->fb)
  45 @@ -674,6 +678,9 @@ static int vc4_fkms_enable_vblank(struct
  46
  47  static void vc4_fkms_disable_vblank(struct drm_crtc *crtc)
  48  {
  49 +       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  50 +
  51 +       vc4_crtc->vblank_enabled = false;
  52  }
  53
  54  static const struct drm_crtc_funcs vc4_crtc_funcs = {